<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/15/43/640x320/landscape-1445530698-sleep-patterns-people.jpg>
<http://www.goodhousekeeping.com/health/wellness/news/a35114/sleep-habits-of-highly-successful-people/>